diff --git a/tests/c_api_test/test_.py b/tests/c_api_test/test_.py
index e124b6594193..46ab7c9c2b6a 100644
--- a/tests/c_api_test/test_.py
+++ b/tests/c_api_test/test_.py
@@ -1,7 +1,6 @@
 # coding: utf-8
 import ctypes
 import os
-
 from platform import system
 
 import numpy as np